Surface Wettability of ZnO Thin Films


  • Mohd Rashid Yusof Hamid Nanotechnology & Catalysis Research Centre (NANOCAT), Institute for Advanced Studies, University of Malaya
  • Azman Ma'amor Department of Chemistry, Faculty of Science, University of Malaya
  • Ong Boon Hoong Nanotechnology & Catalysis Research Centre (NANOCAT), Institute for Advanced Studies, University of Malaya



surface coatings, chemical synthesis, salt precursor, low temperature, hydrophobic, surface roughness


In this study, zinc oxide (ZnO) structured films were grown on glass substrates using a simple chemical bath deposition (CBD) method with different salt precursors. The variation of salt precursors towards the surface morphology of thin films and its wettability properties were investigated. Four types of zinc (Zn) salt used as precursors are zinc chloride (ZnCl2), zinc acetate (ZnAc2), zinc nitrate (Zn(NO3)2) and zinc sulfate (ZnSO4). The crystallinity of ZnO thin films was evaluated using X-ray diffraction (XRD), and the surface morphology was observed using field emission scanning electron microscopy (FESEM). Finally, the wettability was determined by contact angle (CA) measurement. It was found that ZnCl2 has the lowest CA (127.1°), while ZnSO4 exhibits the highest CA (142.3°). The Zn salts used significantly influenced the thin film surface morphology, resulting in varied wetting behaviour depending on the surface roughness.


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How to Cite

Yusof Hamid, M. R., Ma’amor, A., & Ong, B. H. (2022). Surface Wettability of ZnO Thin Films. Malaysian NANO-An International Journal, 2(1), 46–54.